Accelration=changespeed/changetime
changetime=8
changespeed=45-5=40
40/8=5
5m/s^2 is acceleration
Answer:
A hydraulic press works on the principle of Pascal's law, which states that when pressure is applied to a confined fluid, the pressure change occurs throughout the entire fluid. Within the hydraulic press, there is a piston that works as a pump, that provides a modest mechanical force to a small area of the sample.
Explanation:
Answer:
Option a.
Total area of the cells to generate 6.7 kW, A = 61.4 
Given:
The efficiency of the cell,
= 9.1%
Power generated by the cells, P = 6.7 kW
Intensity of light, I = 1200 W/ 
Solution:
Using the formula for intensity of light, I = 
rearranging the above formula for Area, A:
Area, A = 
Now, putting values in the above formula:
Area, A = 
Area, A = 61.355 ≈ 61.4 
The solution for this problem is:
Work it backwards: spring U = ½kx² = ½ * 4000N/m * (0.10m) ²
= 20 J
so the pre-impact of KE = 20 J = ½ * m * v² = ½ * 0.40kg * v²
v = 10 m/s → for the bullet/block.
Now conserve the momentum:
50g * u = 400g * 10m/s
u = 80 m/s is the arrow
velocity